n.[C]

1. 保留者；保持者
2. 【机】护圈；定位器
3. 家臣，侍从；仆人；雇员
   Her arrival had just been announced by the faithful retainer.

   她的忠仆刚宣布了她的到来。

n.[U]

1. 【律】（对财产的）保留；保留授权
2. （律师等的）雇，聘；聘用定金
   a one-hundred-dollar retainer agreement

   一个一百美元的聘用定金协议

n.

1. a thing that holds something in place.
2. a fee paid in advance to a barrister, in order to secure their services.
3. Brit. a reduced rent paid to retain accommodation during a period of non-occupancy.
4. a servant who has worked for a person or family for a long time.